docs: def style_similarity(page1, page2):
      """
      Computes CSS style Similarity between two DOM trees
  
      A = classes(Document_1)
      B = classes(Document_2)
  
      style_similarity = |A & B| / (|A| + |B| - |A & B|)
  
      :param page1: html of the page1
      :param page2: html of the page2
      :return: Number between 0 and 1. If the number is next to 1 the page are really similar.
      """
      classes_page1 = get_classes(page1)
      classes_page2 = get_classes(page2)
      return jaccard_similarity(classes_page1, classes_page2)